Contact device for apparatus for lighting or extinguishing gas.



No. 776,154. PATENTED NOV. 29, 1904.

1 F. TESTOR.

CONTACT DEVICE FOR APPARATUS FOR LIGHTING OR EXTINGUISHING GAS.

APPLICATION FILED AUG. 16, 1904.

N0 MODEL.

Patented November 29, 1904.

PATENT OFFICE.

FREDRIK TESTOR, OF STOCKHOLM, SWVEDEN.

CONTACT DEVICE FOR APPARATUS FOR LIGHTING 0R EXTINGUISHING GAS.

SPECIFICATION forming part of Letters Patent No. 776,154, dated November 29, 1904.

' Application filed August 16, 1904:. Serial No. 220,933. (No model.)

To a. whom it may concern:

Be it known that I, FREDRIK TEs'roR, manufacturer, a subject of the King of Sweden and Norway, and a resident of Surbrunnsgatan 49, Stockholm, in the Kingdom of Sweden, have invented certain new and useful Improvements in Contact Devices for Apparatus for Electric Lighting or Extinguishing of Gas, of which the following is a specification.

The present invention relates to a contact device adapted for electric ignition of gasjets when a bolt is pushed and for their extinction when the bolt is withdrawn. The contact device is constructed so as to give full security of obtaining in the latter case a contact of suflicient duration to effect the closing of the gas-cock or the gas-inlet and the extinguishing of the gas, so that the latter will not continue burning on the bolt being withdrawn when a person leaves the apartment-for instance, a water-closet. In the electric ignition of gas-jets an electromagnet is well known to be used, which is put in action by closing an electric current, causing a gascock to be turned or a gas-inlet to be opened, so that gas escapes from the burner, said gas being ignited by means of a platinum wire, for instance, which is made to glow when the aforesaid current is closed or by some other means. For putting out gas-fiames the electromagnet subsequently must be actuated anew, so as to enable it to turn the gas-cock back to its closed position or to shut the gasinlet. Experience has proved, however, that the current required for returning the gascock into its closed position must not be of too short a duration, since in that case it may easily happen that no closing of said cock takes place, which is evidently an important circumstance if the gas-jet is supposed to be closed when a person leaves the apartment where it is situated. This inconvenience is obviated in the present invention by causing the contact to be of longer duration in closing the current serving for extinctionreturning the gas-cockthan in closing the other current for opening the passage of the gas to the burner.

In the accompanying drawings the contact device referred to is illustrated in combination with a door-bolt in two different positions in Figures 1 and 2.

a is the bolt, which is shifted by means of the button I). The contact device proper is composed of a double lever 0, normally held lifted by a spring, so as to be in the path of the bolt, which is cut off obliquely at its front edge, said lever carrying a contact-arm (.Z, electrically connected thereto and being forked in the drawings. This contact-arm is adapted to oscillate over two contacts a and f, con-- nected one, a, with one branch of a circuit actuating the gas-cock or the device for admitting gas to the burners for closing it and the other, f, with one branch of a circuit serving to open the gas-cock or the device for admitting gas to the burners. The other branch, g, which may be common to both circuits, is connected, for instance, with the plate on which the lever c with the contactarm (Z is so arranged as to be inclosed in the circuit. The end of the lever c which points away from the bolt is connected with a plunger fitting closely in a cylinder 70, which should be arranged to rock so as to adjust itself to the different positions of the plunger in the oscillating movements of the lever 0.

WVhen the bolt (4 is pushed in closed positionfor instance, from withinthe corresponding end of the lever will be depressed and a pin c', attached to this end, finally snaps under the bolt, as shown in Fig. 2, so that the lever 0 will be retained in its position as long as the bolt remains closed. By this movement of the lever the contact-arm (Z is turned first over the contact 0 for closing the gas-cock or the gas-inlet, and subsequently over the contactf, causing the gas-cock or the gas-inlet to be opened and the gas to be lighted. The plunger is simultaneously pulled up into the cylinder 71/. WVhen the bolta is withdrawn, the lever 0 will be returned to its former position and the contact-arm (Z at the same time passing over the contact a will cause the gascock to be returned to its closed position, and consequently effect the extinction of the gas. This movement of the arm clover the contact (3, however, is much slower than over the contact f, since the plunger at this portion of the turning movement of the arm experiences an increasing resistance from the air beneath it in the cylinder, said air thus impeding the movement of the lever 0 in. this part of its turning and compelling the contact-arm (Z to pass over the contact a so slowly as to assure that the current closed through 6 will have had time to effect the closing of the gas-cock or of the gas-inlet.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is- An improved contact device for electric lighting and extinguishing of gas when a bolt is being pushed or withdrawn, consisting of 

